Rantac 150 Mg Tablet (Ranitidine)

Last Updated on 04/29/2026 ✔ Medically Reviewed by Dr. Arjun Srivastav

What Is Rantac 150 Mg Tablet?

Rantac 150 mg tablet is a medicine that helps with problems caused by too much stomach acid. You get 150 mg of Ranitidine as the generic element in each Rantac 150 mg tablet.

The doctors recommend it for conditions such as-

• GERD, which helps to reduce heartburn and stomach acids.
• Erosive esophagitis, which reduces the inflammation along the food pipe.
• Stomach and duodenal ulcers.
• Gastric ulcers due to the use of NSAIDs for a long time

Ranitidine and other H2 blocker histamine antagonists are better than the old proton pump inhibitors like omeprazole because they work faster. However, in some countries, such as the USA and some parts of Australia, Ranitidine and other H2 blocker histamine antagonists have been withdrawn from the market.

This is because there are concerns that Ranitidine and other H2 blocker histamine antagonists might cause cancer.

✓ Composition:

• Active Ingredient: Ranitidine is the chief generic element inside the medicine inside a tablet of Rantac 150 mg tablet.
• Appearance: Rounded film-coated tablet, pale yellow or off-white

✓ Manufacturer:

JB Chemicals and Pharmaceuticals Ltd is the manufacturer of the Rantac 150 mg tablet pills.

✓ Onset Of Action:

• Peak Plasma Concentration: Ranitidine reaches its peak levels in your blood within 1 to 2 hours of intake.
• Beginning of changes: It usually acts fast and clears symptoms of heartburn, stomach cramps, and pain or irritation within 2 hours of intake.

Uses of Rantac 150 mg

1. Heartburn & Acidity

• Relieves burning sensation in the chest
• Reduces excess stomach acid

2. Acid Reflux (GERD)

• Treats Gastroesophageal Reflux Disease
• Prevents acid from moving back into the esophagus

3. Stomach & Intestinal Ulcers

• Used in Peptic Ulcer Disease
• Helps ulcers heal by lowering acid levels

4. Excess Acid Conditions

• Conditions like Zollinger-Ellison syndrome
• Controls high acid secretion

5. Ulcer Prevention

• May help prevent ulcers caused by painkillers (NSAIDs)

Mechanism Of Action:

✓ Stopping Histamine:

The stomach has receptors called histamine H2 receptors on the cells that make acid.

✓ Stopping Acid Release:

Ranitidine sticks to these H2 receptors, which stops histamine from working.

✓ Reducing Volume and Concentration:

The medicine reduces the volume of juice and the acid level in it by stopping a certain signal.

This signal is what makes the stomach produce a lot of juice with high acid levels. So, when the medicine inhibits this signal, it reduces both the volume of juice and its acid level.

✓ Promoting Healing:

When the acid level is lower, the stomach and the food pipe, also known as the oesophagus, are not irritated much.

This allows the damaged tissues and ulcers, in the stomach and the oesophagus, to heal on their own naturally.

How Long Does It Last?

Its rapid action is boosted by long-lasting action too. Taking each medicine will help you to get effects for up to 8 to 12 hours, depending on the dose.

So, this means that for mild issues,s you can take a single pill per day or else the doctors can recommend 2 pills each taken once in the morning and at night.

Benefits Of Rantac 150 Mg Tablet:

1. Faster Symptom Relief

The main advantage of this medicine is that it works fast. It does not need any stomach acid to start working.

It begins to reduce acid in about 2 to 3 hours.

2. Potent And Sustained Acid Control

Rantac gives steady acid control over 8 to 12 hours.

• Nighttime Relief: It really works well at stopping acid from coming up at night. This means you are less likely to wake up with heartburn or a sour taste.
• Healing Rates: Studies have found that Rantac helps heal acid damage in the oesophagus better than usual treatments. Rantac heals effectively.

3. Dosing Flexibility

You can take this medicine at any time of the day, before or even after having your food, unlike other medicines.

Dosage Details Of Rantac 150 Mg Tablet:

Even though most doctors recommend taking a single pill each time, the doctors will check and assess the type of condition, its severity and match the dosage based on your age and health.

• For GERD/Reflux: A single pill of 150 mg for mild and 300 mg for severe issues taken for at least 8 weeks.
• For Gastric/Duodenal Ulcers: A single pill for 4 to 6 months.

✓ Missed Dose

Take the medicine if you remember about your missed dose within 10 hours of the next dose, or else skip it. However, do not double up your dose the next time if you forget taking the previous dose.

✓ Overdose

Some overdose studies show that patients can have a few issues within minutes, like stomach pain, diarrhea, nausea, or dizziness.

Drug Interactions Of Rantac 150 Mg Tablet

✓ Absorption Interactions (pH-Dependent):

Rantac reduces stomach acids, and thus any other medicine needing low pH activation may be suppressed. Here are a few types of medicines that may not work with Rantac-

Antifungals: Ketoconazole, Itraconazole.

Cancer Medications: pills like Erlotinib or Gefitinib.

HIV Medications: Atazanavir, Nelfinavir.

✓ Liver Enzyme Interactions (CYP450 System)

CYP3A4 Inhibitors: Avoid a pill like Clarithromycin, which can inhibit the CYP3A4, causing drug toxicity.

CYP3A4 Inducers: pills like Rifampin for TB can actually increase the metabolism of Ranitidine, thus reducing its effects.

Digoxin: Rantac can slow down the action of Digoxin, causing drug toxicity.

Precautions And Warnings Of Rantac 150 Mg Tablet

✓ Allergic problems:

Avoid taking the medicine if you are allergic to Ranitidine with an earlier experience or any of its other excipients in the drug.

• Skin rashes or hives
• Swelling of the lips and mouth
• Inflammation of the limbs
• Severe Liver or Kidney Impairment:

✓ Liver or kidney disorders:

A patient with any kind of existing liver or kidney condition should tell it to the doctors about it. You will have to go through LFT, KFT, creatinine, bilirubin, and other tests.

✓ Pregnancy & Breastfeeding:

During pregnancy, this medicine is given to control signs of GERD or gastric ulcers, but in limited amounts. However, in the case of breastfeeding, it is not safe at all as it passes on to your breastmilk.

Safety Advice

✓ Long-Term Use Considerations:

It can alter stomach acid production and secretion if taken daily for more than a year. It is generally not safe for use in children below the age of 6 years.

✓ With existing health conditions:

Inform the doctors if you have existing health conditions such as recent fractures, other stomach infections caused by fungi or worms and stomach or intestinal cancer where the patient is undergoing chemotherapy.

✓ Regular health checkups and tests:

Doctors will conduct regular tests like LFT, Creatinine, CBC count, and a saliva test.

✓ Alcohol:

Alcohol use can irritate the stomach even further, risking severe stomach pain, severe bloating, and other side effects like nausea or dizziness.

Storage Details:

Store the medicine at a soothing, normal room temperature area, but with less humidity and no direct sunlight contact.

Where To Buy Rantac 150 mg tablet in Australia?

You can rely on trusted platforms such as australiarxmeds.com for secure and discreet delivery across Australia.

Rantac 150 is available for online purchase through pharmacy websites, but it’s important to choose reputable and licensed sellers to guarantee product quality, authenticity, and safety.